Flux creep and high-field critical currents in epitaxial thin films of YBa/sub 2/Cu/sub 3/O/sub 7/

Journal Article · Mon Apr 24 00:00:00 EDT 1989 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.62.2044· OSTI ID:6292759

Hettinger, J D; Swanson, A G; Skocpol, W J; Brooks, J S; Graybeal, J M; Mankiewich, P M; Howard, R E; Straughn, B L; Burkhardt, E G

The critical current density J/sub c/(B,T) is measured to 15 T for c-axis-perpendicular expitaxial thin films of YBa/sub 2/Cu/sub 3/O/sub 7/ with J/sub c/(0,77 K) of order 10/sup 6/ A/cm/sup 2/. Even in the least-favorable perpendicular orientation, critical currents can exceed 5 x 10/sup 5/ A/cm/sup 2/ at 20 K in 15-T fields. Thermally activated flux motion (flux creep) is prominently observed, and can in large part explain the magnitude, temperature, and field dependence of the high-field critical currents.

• Research Organization: Department of Physics, Boston University, Boston, Massachusetts 02215
• OSTI ID: 6292759
• Journal Information: Phys. Rev. Lett.; (United States), Vol. 62:17
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CRITICAL CURRENT
COPPER OXIDES
YTTRIUM OXIDES
MAGNETIC FIELDS
MAGNETIC FLUX
SUPERCONDUCTING FILMS
TEMPERATURE DEPENDENCE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CURRENTS
ELECTRIC CURRENTS
FILMS
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties